| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 20840.4-2015 | English | 469 |
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Days<=4
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Instrument transformers -- Part 4: Additional requirements for combined transformers
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GB/T 20840.4-2015
| Valid |
GB/T 20840.4-2015
|